Ron Ringsrud was the host and guide in Bogotá for visits to the emerald marketplace from foreign buyers since 1986. He has also hosted groups from the L.A. County Museum of Natural History and the G.I.A. on their trips to the Colombian emerald source. Six blocks from downtown Bogota's famous Emerald District, Ronald has acquired a comfortable and convenient residence in Bogota where invited buyers can stay as an alternative to hotels while in Colombia's capital city.

Ronald Ringsrud Co. is a wholesale emerald importing business based in Saratoga, California, and Bogotá, Colombia. We exhibit annually at the Tucson Gem Show and the JCK show Las Vegas.


RR Co. Contact Information:

Ronald Ringsrud Co., Box 128, Saratoga CA  95071 '          Tel. 415 254 2474   email:ron@emeraldmine.com

For over fifteen years RR Co. (Ronald Ringsrud Company) has supported charitable groups in Colombia whose success and worthiness can be seen HERE.


Publications and Awards

Gota de Aceite, Nomenclature for the Finest Colombian Emeralds - Gems & Gemology Magazine, Fall 2008, pages 242-245

The Enhancement of Emeralds in Bogota, Colombia - Gems & Gemology Magazine, Fall 1983, pages 149-156

Coscuez: A Major Source of Colombian Emeralds - Gems & Gemology, Summer 1986 pages 68 -79

Muzo Emerald - Lapidary Journal, Jan.1988

Tunnels in Use at Muzo Colombia - In Focus (Quarterly publication of the G.l.A. Alumni Association) Summer 1989

Prospecting for Adventure - In Focus (Quarterly publication of the G.l.A. Alumni Association) Fall 1995

Award: Most Valuable Article Award, 1983 Gems & Gemology Magazine

Robb Report Magazine, November 2001, Hearts of Stone p.166

Presentations and Lectures:

Lions Club International District 4-L1, Jan. 86

G.l.A. (Gemological Institute of America) Alumni Ass., '86

Gemological Institute of America, Student Assembly, Aug. 87

G.l.A. Tour of South America: Bogotá 1988

Museum of Natural History of L A. County Tour, Bogot. 89

Gemological Institute of America, Aug. 90

The Industrial Club, Monterrey, Mexico, Sept. 90

G.l.A. International Symposium, Century Plaza Hotel, Los Angeles, Featured Speaker, June '91

Industrias JD, Mexico City, Seminar on Gemology, May '95

Foro Internacional de la Esmeralda, Colombian Mining Ministry, Bogotá, 1996

FENALCO Colombian Business Roundtable, Bogotá Hilton, Aug. 1997

AGTA Seminar, Tucson Convention Center, Feb. 1998

First World Emerald Congress, Bogotá Radisson Center, Feb. 1998

G.I.A. Alumni Association, Golden Gate Chapter, San Francisco, 1998

G.I.A. Alumni Association, Central Valley Chapter, Sacramento, 1999

G.I.A. Alumni Association, Las Vegas Chapter, 2001

A.G.T.A. Lecture, Tucson Convention Center, with Richard Hughes       Feb. 2007

G.I.A. Student and Staff Lecture, Carlsbad, 2008

NAJA: National Association of Jewelry Appraisers meeting, Tucson Convention Center, Feb. 2010

Geo-Literary Society Meeting, Crystal Ballroom, Tucson Convention Center, Tucson Gem & Mineral Show, Feb. 2010